Method and device for determining the beginning of a start phase of an internal combustion engine in a hybrid vehicle

US8738205B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Frank Steuernagel · Stuttgart, DE
• Alexander Maass · Ludwigsburg, DE
• Andreas Seel · Bonn, DE

Key dates

• Filing date: Apr 20, 2010
• Grant date: May 27, 2014
• Expiry date: Sep 23, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/64
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method for determining the beginning of a start phase of an internal combustion engine in a hybrid vehicle, in which a second drive unit drives the hybrid vehicle, the internal combustion engine being started upon reaching a certain drive torque of the second drive unit. In order to always be able to achieve the maximum solely electric driving range of the hybrid vehicle using the second drive unit and simultaneously improve the driving comfort of the hybrid vehicle by optimizing the internal combustion engine start triggering, the internal combustion engine is started when a predicted drive torque of the second drive unit is less than or equal to the drive torque, as instantaneously measured and increased by a torque reserve, of the second drive unit.